As one of the major projector technologies , DLP power many models , from high - end home cinema models to portable models .
As clever as the technology is , most projectors have the DLP rainbow effect to some academic degree or another . Whether or not this is an take depends on the role model of the projector , how sensitive you are to the effect and the eccentric of cognitive content you ’re watching . We ’ll explicate it all here .
What is the rainbow effect?
The rainbow core is best described as a newsflash of rainbow gloss , usually discern at the corner of your eye , rather than something that you see head teacher on . The phenomenon can often be spotted when you move your head observe motion on screen , when there are tight - moving object , when there ’s a conversion between scenes and even if you blink .
The effect can be bad with black-market and white footage . We find that watching shameful and lily-white footage and blinking can ordinarily take on the event . Not very useful for delectation , but it does help us recount what kind of engineering science a projector is using . you’re able to see an illustration of the rainbow effect below , have using a high - speed video . As you could see , the hand is made up of multiple colours , more or less out of sync .
Why do we see the rainbow effect?
The rainbow upshot is down to how DLP projector work , and this apply to individual - chip DLP projectors only . In all single - chip DLP projectors , there ’s a DMD ( Digital Micromirror gadget ) at the heart of it . This has hundreds of thou ( or even 1000000 ) of midget mirrors , one for each pixel on the screen . The resolution of the flake define how many mirrors are available .
A calorie-free beginning shines onto the DMD . Each mirror can be pitch to an ‘ on ’ position , where the lighter is reflected out through the lens , or to an ‘ off ’ position , where the twinkle is reflected to a heating system sink and absorbed .
spook of grey are created by rapidly turning the mirror on and off : the more a mirror is on , the close to white it is ; the more to off , the closer to black it is .
This technique allow a DLP projector cast a greyscale image . To supply coloring , there are two methods used . First , is the colour bike , made up of crimson , light-green and blue segments . This spins in front of the light informant , shining the three elementary color .
For each bod of a film or TV show , the DLP projector gleam three images : one red , one green and one blue . As this happens very tight , our brains comprehend one colour mental image , rather than three separate ikon .
For LED or laser images , there ’s no colouring material cycle , but three master colour light origin ( red , green and blasphemous ) , which take turns to shine and make up the picture . Again , the final image is a combination of all three colours , which our Einstein unify into one .
It ’s the fact that three images are being conflate into one that causes the effect . Some hoi polloi are of course more susceptible to the rainbow gist than others .
observe that three - chip DLP projectors , work by the light source being at the same time split into three ( crimson , immature and blue ) and each chip taking on one colouration . And the lense , the three colours are recombined into one paradigm at the same time . This is interchangeable to how LCD projectors work .
What has been done to improve the rainbow effect?
For color wheel DLP projectors , there are some advancements . First , we saw projector that summate a white section to the wheel to help advance brightness level . Next , there are models that have been created to address the rainbow effect by speeding up the process and increasing how many times per arcsecond each colour can be seen for .
Initial projector run at 60Hz per colouration ( each colour was shown 60 times per second ) . Some projector have a faster color wheel that spin at 120 revolution per second , giving 120Hz refresh rates per color . As there ’s a little hold between each coloring being shown , the layering is less obvious and the rainbow effect is harder to see .
Newer projector again , double each colouring on the cycle , again increase the phone number of multiplication each color is shown per secondly to 240 . That helps reduce the rainbow gist .
For optical maser and LED projectors , each igniter can be strobed quicker , better the layering and reducing the rainbow gist .
What can I do to reduce the rainbow effect?
The quality and age of your projector will have a part to play . grease one’s palms a modern DLP projector , such as theXGIMI Horizon Pro , and the issues are severe to spot . We found that we had to go looking for the rainbow effect , rather than see it naturally when we refresh that model .
Outside of that , try watching without proceed around too much . Reducing the ambient light can help , too . If you really fight with the essence , then a three - microchip DLP model or an LCD projector may well be good .
